It sounds like the woman this was made about was never arrested, so the jury's still out as to how accurate this "true" story that's had a couple of revisions over the years is. 'Bohemian Rhapsody' was infuriating because most of it was verifiably untrue. 'Baby Reindeer' is more like 'Tiger King', in that we'll probably never know what actually happened because everyone involved has psychological problems.
For perspective, I used to work pretrial services in a jail intake unit, and one of the things I find frustrating about the recent conversation around abuse is that it's phenomenal how abusers and victims have a way of finding each other, and abusers often have a history of being abused. It doesn't make sense to people who haven't been around that stuff, and it doesn't fit neatly into the public discussion. Whether 'Baby Reindeer' is true or not, I appreciate that it explores how complicated and bizarre these cases can get. Often I found myself despising the victims and defendants almost equally, and I'm impressed by Gadd's ability to be so honest about himself. He may be a victim, but he is certainly no hero.
Production-wise, it's solid. Well written, acted, directed, shot, music... everything is pretty good across the board. The characters themselves are fascinating, which is the show's best attribute. After watching the Piers Morgan interview with real-life Martha I think that actress deserves an Emmy- she nailed it!
I would strongly recommend 'Baby Reindeer' if you're in the mood for something dark and disturbing. It's one of those series/films that keeps you watching out morbid curiosity like "The Jinx", "Tiger King", "You", or "The Dark, Sad Life of Boogie2988". You want to see how far down the well of misery it all goes.